Marine vehicle seat base



FIG. 1 is a front perspective view of a marine vehicle seat base showing my new design;

FIG. 2 is a top plan view of the marine vehicle seat base of FIG. 1;

FIG. 3 is a bottom side view of the marine vehicle seat base of FIG. 1; and,

FIG. 4 is a side elevational view of the marine vehicle seat base of FIG. 1.

The broken lines shown in FIGS. 1 and 3 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a “marine vehicle seat base,” as shown and described. 